Standard Rj45 Connections For Cat5 Cable - LEGRAND D45 SYSTEM Installation Manual

Standard RJ45 connections for CAT5 cable

Two standards (T568A and T568B) of wires connection, both suitable, although it is recommended that they are not mixed in
the same installation. Table 1 shows the two standards.
Pair 2
Pair 3 Pair 1 Pair 4 Pair 3
T568A
taBle 1
pin t568a
n° pair wire colour
1 3
2 3
3 2
4 1
5 1
6 2
7 4
8 4
The four pairs are identified with different colours and each pair carries a different type of signal (see Table 1).
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Pair 2 Pair 3 Pair 3
Pair 1 Pair 4 Pair 2 Pair 1 Pair 4 Pair 2 Pair 1
T568A T568B T568B
Pair 2
Pair 3 Pair 1 Pair 4
T568A
t568B
pair
2
2
3
1
1
3
4
4
12345678
Pair 4
87654321 87654321
Pair 3
Pair 2 Pair 1 Pair 4
T568B
wire colour
12345678
Where is Pin #1?
12345678
87654321
Signal
VIDEO +
VIDEO -
AUDIO +
POWER +
POWER -
AUDIO -
SCS-
SCS+
D45 SyStEm GUIDE 33